Think through italki can make friends or only serves to exchange languages, to practice that language that we want and nothing more.
I made some , but most of them are talked small and dont know each other well.
True friends i talked long are only two.
In my opinion Italki is very useful to practice languages, although it is not always easy to find people that "fit" your needs.
There are some very nice people who make useful corrections, but perhaps don't want to make more contacts, there are some other people who only want to chat or to skype once and nothing else, there also some annoying people who don't even speak or learn any of your languages and despite of this they insist in being language partners...
But I have to say that I've had the luck to make a friend here. Just one, but now we are not only language partners, but also real friends and we have even got to know us personally. We have very nice conversation and I am really happy about having found him here. Will I find more friends like this? I don't know, but I must say: yes, it's possible (perhaps not common, but possible) to make friends through Italki. :)
You right. Geting some corrections or discusing in topics (like this) is the best achievement you can get here or on the another similar sites.
But with SharedTalk you have more chances to find someone for one-time conversation or even more. :)